Although larger than the other inner planets, Earth is much smaller than the gas giants found in the outer solar system. People who live near oceans have more access to freshwater than those who live inland. and harmful effects of man-made materials(e.g.,pollution due to usage of coal for generation of electricity,ozone depletion due to usage of refrigerator and AC(air conditioner) and etc.). Log in. 22 meters in 3.0 seconds near the surface of a planet. High mountains gradually wear down until most of the Earth is at sea level. 2. D: They have never moved. The Earth has been around for about 5 billion years, and has about another 5 billion years to go. Earth is classified as the largest of the terrestrial planets based on its circumference and diameter as well. This site is using cookies under cookie policy. Planet Earth definition: the third planet from the sun , the only planet on which life is known to exist. The surface of a lake corresponds to the surface … Join now. Start studying Planet Earth Mizzou Exam 3- Barquero-Molina. Universe Today has a number of articles including surface of Mars and surface of Mercury . Explain the conditions that allowed the first forms of life to develop on Earth. A. Earth is a spherical body (planet) with a distance of about 93 million miles from the star it orbits. 70% of the Earth’s surface is covered in water that is why Astronauts have dubbed it as the Blue Planet. Earth is the only known planet to have existing life form. Ongoing volcanism: Term. Earth, the only planet in the solar system known to support life, is a beautiful planet composed 71% of salt water and 30% land and fresh water on its surface. Which of the following statements best describes the availability of freshwater on Earth? Surface of Earth. At the planet’s center lies a dense metallic core. This layer is also responsible for weather, including rain, which protects Earth… Earth's atmosphere differs from those of near-neighbor planets, Venus and Mars, in one important respect in that (d) it has a significant fraction of oxygen in it. Learn vocabulary, terms, and more with flashcards, games, and other study tools. Scientists know that the core is metal for a few reasons. If the numerator of a fraction is increasedby 20% and its denominator is diminished16by 10%, the value of the fraction is The21original fraction is Which best describes the heat that arrives at Eart At the equator, Earth's circumference is … GES Quiz 6 1) Which of the following best describes the Earth's average surface temperature for the past million years? The density of Earth’s surface layers is much less than the overall density of the planet, as calculated from the planet’s rotation. Like the other terrestrial planets, the Earth also has craters created by impact of meteors, volcanoes both active and dormant, valleys, mountains & canyons. The Earth is the only planet known to support life. From space, the oceans give it a bluish color, land regions look brown, and cloud cover looks white. Calculating Solar Energy to Surface Energy from Sun to Earth. 3. A. a planet covered in alternating bands of land and water B. a planet covered mostly by land C. a planet covered equally by land and water D. a “blue planet” covered mostly by water planet earth is considered as blue planet. B: They stayed the same for millions of years but are now moving. J1. Definition. There are over 50 major asteroid impacts found on Earth. The passage describes some ways that changes in the earth and changes in people are similar. The existence of life is attributed to the movement of tectonic plates that allow for carbon dioxide recycling and prevent runaway greenhouse effect. 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